Locating similiar, connected entries inside matrix

Imagine having a logical matrix, with all zeroes, except a few separated islands of ones. Like this:

 [0 0 0 0 1 0 0 0 0 1;...
  0 0 0 1 1 1 0 0 1 1;...
  0 0 0 1 1 0 0 0 1 1;...
  0 0 0 0 0 0 0 0 0 0;...
  0 0 0 0 0 0 0 0 0 0;...
  0 0 0 0 1 1 0 0 0 0]

I can locate the row and column pairs for all the ones, but how to I get them divided into the three corresponding groups?

Answer 1

[Walter Roberson]

If you have the image processing toolbox, use bwlabel()

[Jeppe]

That is exactly what I was looking for. Thank you

[Image Analyst]

Yes, but then what? I'm sure that's not the final step. What are you going to do next? The usual thing is to call regionprops() to make measurements of the individual regions. With later versions of MATLAB, you can just pass the binary matrix into regionprops() directly and bypass bwlabel().